html, body {
    height: 100%;
    margin: 0;
    padding: 0;
}

.header {
    /* padding: 0 80px; */
    height: 60px;
    width: 100%;
    z-index: 99;
    background-color: #3d3f3f;
}

.header2 {
    margin: 0 100px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 100%;
}

.logo {
    width: 40px;
    height: 50px;
}

.nav {
    display: flex;
    justify-content: space-around;
    align-items: center;
}

.nav-item {
    margin: 0 15px;
    font-size: 20px;
}

.nav-item>a {
    cursor: pointer;
    text-decoration: none;
    color: #ffffff;
}

.banner {
    width: 1340px;
    height: 400px;
    overflow: hidden;
    text-align: center;
    margin: 0 auto;
}

.banner>img {
    width: 100%;
}

.content {
    margin: 0 auto;
    margin-top: 60px;
    margin-bottom: 80px;
}

.container {
    max-width: 1340px;
    display: flex;
    margin: 80px auto;
    justify-content: space-between;
}

.sign {
    width: 28%;
    justify-content: center;
    align-content: center;
    font-size: 18px;
}

.sign-title {
    width: 100%;
    text-align: center;
    margin-bottom: 50px;
}

/* .sign .item {
    margin: 6px;
    display: flex;
    justify-items: center;
}

.sign .item label {
    white-space: nowrap;
}

.sign .item>* {
    flex-shrink: 1;
}

.sign input {
    font-size: 20px;
} */

.sign button {
    font-size: 18px;
}

.buttons {
    width: 100%;
    display: flex;
    justify-content: space-evenly;
    align-content: center;
}

.news {
    width: 55%;
    display: flex;
    flex-direction: column;
    justify-content: space-evenly;
}

.news-item {
    margin: 10px 0;
}

.news-item>a {
    font-size: 20px !important;
}

.works {
    width: 1340px;
    margin: 0 auto;
}

.videoes {
    display: flex;
    width: 100%;
    justify-content: space-evenly;
}

.video-item {
    padding: 5px;
    margin: 15px;
    box-shadow: 5px 5px 20px #3d3f3f80;
}

.fixed {
    position: fixed;
    top: 0;
    left: 0;
}

.float-play {
    position: absolute;
    width: 320px;
    height: 240px;
    display: flex;
    justify-content: center;
    align-items: center;
    margin-top: -240px;
    z-index: 99;
    opacity: 0;
    cursor: pointer;
}

.float-play>i {
    font-size: 80px;
    color: #fff;
}

.float-play:hover {
    opacity: 1;
}

.play {
    width: 60px;
    height: 60px;
}

input {
    height: 38px;
    line-height: 1.3;
    line-height: 38px;
    border-width: 1px;
    border-style: solid;
    background-color: #fff;
    border-radius: 2px;
    padding-left: 10px;
}

input:hover {
    border-color: #D2D2D2!important;
}

.school-list {
    margin: 0 auto;
    display: flex;
    justify-content: space-evenly;
    align-items: center;
    font-size: 20px;
    height: 80px;
}

.school {
    width: 400px;
    text-align: center;
    cursor: pointer;
}

.school.select {
    color: #009688;
}

.footer {
    height: 100px;
}

/*   */

.layui-card {
    margin-bottom: 0;
}

.video-fullscreen {
    position: fixed;
    width: 100%;
    height: 100%;
    justify-content: center;
    align-items: center;
    display: none;
    top: 0;
    z-index: 999;
}